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Author Pham Thu Nga ♦ Nguyen Van Chuc ♦ Vu Due Chinh ♦ Nguyen Xuan Nghia ♦ Phan Tien Dung ♦ Pham Thai Cuong ♦ Chu Viet Ha ♦ Vu Hong Hanh ♦ Vu Thi Kim Lien ♦ Dao Nguyen Thuan ♦ Barthou, C. ♦ Benalloul, P. ♦ Romanelli, M. ♦ Maitre, A.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2006
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Optical sensors ♦ Nanocrystals ♦ Quantum dots ♦ Biomedical optical imaging ♦ Zinc compounds ♦ Photoluminescence ♦ Effective mass ♦ Absorption ♦ Radiative recombination ♦ Spontaneous emission
Abstract We present results on the synthesis of core-shell CdSe/ZnS semiconductor nanocrystal quantum dots (NQDs) and their optical enhancement properties. A very strong and narrow photoluminescence is observed for sizes varying from 2 to 5 nm. Using an effective mass theory, we model the energy shift for the first excited state for core and core/shell NQDs. Core/shell heterostructure can be used to significantly increase the absorption cross section and decrease the efficiency of Auger recombination. Opal structures prepared from silica beads are also reported. This photonic crystal infiltrated with NQDs shows promise in biological detection.
Description Author affiliation: Vietnamese Acad. of Sci. & Technol., Hanoi (Pham Thu Nga; Nguyen Van Chuc; Vu Due Chinh; Nguyen Xuan Nghia; Phan Tien Dung)
ISBN 1424403758
ISSN 19300395
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2006-10-22
Publisher Place South Korea
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 5.00 MB
Page Count 4
Starting Page 22
Ending Page 25


Source: IEEE Xplore Digital Library